JP2010202230A - Device for continuously connecting packing string in automatic string tying machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for continuously connecting a packing string in an automatic string tying machine capable of immediately and reliably connecting a string from one string coil body after completing the supply of the string from the other string coil body in the automatic string tying machine for tying the string to an object to be bound in a flat shape by the outer-taking system. <P>SOLUTION: The device includes a first string coil body 20a and a second string coil body 20b which are turned in the horizontal direction. A tip of a first string 10a drawn out of an outer circumferential surface of the first string coil body 20a is delivered to the downstream side of a string passage, and a tip of a second string 10b drawn from the outer circumferential surface of the second string coil body 20b is made to wait in the middle of the string passage. When a terminating end 31 of the first string 10a passes through the waiting position of the second string 10b, the terminating end 31 of the first string 10a and the tip 36 of the second string 10b are connected to each other by the heat bonding by operating a heat bonding means 30 arranged opposing the waiting position. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a continuous connection device for packing strings in an automatic strapping machine, and more specifically, two strap coils so that two strap coil bodies of an outside arrangement arranged in a substantially horizontal state can be used continuously. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packing string continuous connection device in an automatic stringing machine for heat-sealing between string ends of a body.

  For example, a large number of thin objects to be bound such as corrugated cardboard sheets folded into a sheet (a corrugated cardboard box is formed when assembled) are shipped to the market in a stacked state. In such an automatic tying machine which automatically ties a thin and flexible material to be bound and ties between the ends of the lace, a flexible polyethylene string having a thickness of about several tens of μm and a width of about 50 mm, polypropylene Strings are used. And this packing string is generally used in the state where the width direction both ends are folded in the center and about 25 mm wide.

  Here, in the automatic tying machine, as disclosed in Patent Document 1, there are two methods, namely, the outside method shown in FIG. 4 and the inside method shown in FIG. is there. In the exterior method of FIG. 4, the rotational axis of the string coil body 2 is set in the horizontal direction, and the tip 3 of the packing string 1 on the outer peripheral surface is pulled out from this state. In this case, the string coil body 2 rotates simultaneously with the withdrawal of the tip 3 of the packing string 1.

  On the other hand, in the interior arrangement method of FIG. 5, the cord coil body 2 is placed on the holder 12 or the like in a standing posture, and the terminal portion 4 of the packing cord 1 on the inner peripheral surface is pulled out and used from that state. In this case, the string coil body 2 does not rotate when the end portion 4 of the packing string 1 is pulled out.

  Further, in the case of the interior arrangement method of FIG. 5, when the packing string 1 is pulled out in the direction of arrow A, the packing string 1 is sent out in a twisted state. Therefore, the interior arrangement method of FIG. 5 is not suitable for performing so-called flat hanging over a bundled body such as a corrugated cardboard sheet in a state where the string is spread. The method is suitable.

  By the way, in the case where flattening is continuously performed on the object to be bound, two string coil bodies are prepared in advance, and the other string coil body is in a standby state while one string coil body is being used. . And after use of one string coil body is completed, it is necessary to connect immediately between the termination | terminus part and the string front-end | tip part pulled out from the other string coil body.

  Hereinafter, the continuous connection device for packing strings described in Patent Document 1 will be described with reference to FIGS. 6 and 7.

  In this continuous connection device, as shown in FIG. 6, two string coil bodies 2a and 2b arranged in the horizontal direction are prepared. While one string coil body 2a is used, the other string coil body 2b is in a standby state, and when the use of the string coil body 2a is completed, the first string 1a pulled out from the string coil body 2a. Is connected to the tip of the second cord 1b drawn from the other cord coil body 2b.

Thus, in the continuous connection apparatus which connects between two string end parts, the terminal part 4a of one string coil body 2a to be used first and the terminal part 4b of the other string coil body 2b to be used next are The knots 13 and 15 are provided in advance. And the front-end | tip part 3 of the 1st string 1a pulled out from one string coil body 2a used initially is inserted in the pinch roller 9 through the knot detector 7 and the knot coupler 8, and is used for actual string hooking. used.

  The knot detector 7 includes a rod-shaped detection tool 7a and a plate-shaped pressing tool 7b, and the detection tool 7a and the pressing tool 7b are in close contact with the first string 1a interposed therebetween. Therefore, if all the 1st string 1a is used and the knot 13 provided in the terminal part 4a of the 1st string 1a passes between the detection tool 7a and the pressing tool 7b, the knot 13 can be detected.

  On the other hand, the knot coupler 8 includes a packing string holder 8a and a packing string squeezing tool 8b, and the packing string holder 8a is provided at four locations around the first string 1a. A second string 1b is attached to the holder 8a so as to go around the first string 1a and intersect. And the part which this 2nd string 1b cross | intersects is shown as the cross | intersection part 14 in the figure. Further, two packing string squeezing tools 8b are arranged outside the packing string holder 8a. That is, the second string 1b is restrained by the packing string squeezing tool 8b before and after the second string 1b is mounted on the packing string holder 8a.

  As shown in FIG. 7, the knot detector 7 detects the knot 13 of the first packing cord 1a. When the knot detector 7 detects the knot 13, the signal is transmitted to the packing string coupler 8. Then, the four packing string holders 8a are retracted all at once, and the second string 1b that goes around the first string 1a becomes free in a state having the crossing portion 14. The second string 1b is constrained by two packing string squeezing tools 8b, and when the packing string squeezing tool 8b moves away from each other, the crossing portion 14 holds the knot 15 with the first string 1a included. Form.

  Thus, in patent document 1, when use of one string coil body 2a is completed, between the 1st string 1a and the 2nd load string 1b from the other string coil body 2b is connected. Yes.

  Thereby, even if it is an automation line, it is supposed that it will tie up continuously, without interrupting work.

JP 2007-106482 A

  By the way, in the conventional continuous strapping device for connecting the two cord ends in this way, it is difficult to adjust the knot detector 7 and the strap strap 8 and the knots 13 and 15 are temporarily adjusted. If the fruiting is insufficient, there is a risk that the connected ends of the cords will come off later.

  In the present invention, in view of such a conventional situation, when so-called flat hanging is performed in a state where a string is spread over a bundled object by an outside method, supply of a string from one string coil body is completed. Then, it aims at providing the continuous connection apparatus of the packing string in the automatic stringing machine which can connect the string from another string coil body surely immediately after.

In order to achieve the above object, a continuous connection device for packing strings in an automatic strapping machine according to the present invention,
The first string coil body and the second string coil body that rotate in the horizontal direction, and the first string leading out from the outer peripheral surface of the first string coil body is sent to the downstream of the string passage, Let the tip of the second string drawn from the outer peripheral surface of the second string coil body stand by in the middle of the string path,
When the end portion of the first string passes through the standby position of the second string, the heat fusion means arranged to face the standby position is operated,
The terminal part of the first string and the tip part of the second string are connected by heat fusion.

  According to this invention by the structure which concerns, it can connect reliably between the string termination | terminus part of a 1st string coil body, and the string front-end | tip part of the 2nd string coil body in a standby position by heat sealing | fusion.

  In the present invention, a sensor for detecting the passage of the end portion of the string is installed in the string path from the installation position of the first string coil body and the second string coil body to the standby position of the second string. It is preferable that the heat fusion means is operated based on an output signal from the sensor.

  With such a configuration, the end portions of the cord can be automatically connected.

  According to the continuous connection device of the packing string in the automatic strapping machine according to the present invention, the connection between the ends of the two string coil bodies of the so-called outside method is performed in which the string is stretched over the object to be bound. It can be performed continuously and reliably after the use of one string coil body is completed.

  Further, by operating the heat fusion means based on the output signal from the sensor, it is possible to automatically perform the connection between the string ends.

FIG. 1 is a schematic view of a device for continuously connecting packing strings in an automatic strapping machine according to an embodiment of the present invention. FIG. 2 is a perspective view of a heat-sealing device employed in the continuous connection device for packing strings shown in FIG. FIG. 3 is a front view of FIG. FIG. 4 is a perspective view when a string is unwound from a conventional string coil body disclosed in Japanese Patent Application Laid-Open No. 2007-106482 by a removal method. FIG. 5 is a perspective view when a string is unwound from a conventional string coil body disclosed in Japanese Patent Application Laid-Open No. 2007-106482 by an internal arrangement method. FIG. 6 is a perspective view of a continuous supply device for a packing string that continuously unwinds a string from the conventional coiled coil body disclosed in Japanese Patent Application Laid-Open No. 2007-106482 by an outside method. FIG. 7 is a perspective view of a continuous supply device for a packing string that continuously draws out a string from the conventional string coil body disclosed in Japanese Patent Application Laid-Open No. 2007-106482 by an external method and connects the ends of the string.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a packing string continuous connection device 40 in an automatic stringer according to an embodiment of the present invention. In the continuous connection device 40 of this automatic strapping machine, the first string coil body 20a around which the first string 10a made of a flexible material made of synthetic resin is wound and the second string 10b wound around the first string coil body 20a. Two string coil bodies with the two string coil bodies 20b are prepared in advance, and the string supply is continuously performed by the outside method. The two string coil bodies 20a and 20b are rotatably supported by the holding members 5a and 5b.

The first string 10a drawn out from the first string coil body 20a that is used first is sent to the downstream side of the string path through which the string is supplied, via the guide roller 16A. The tip of the second string 10b pulled out from the second string coil body 20b used next passes through the guide roller 16B,
It is supplied to the downstream side of the string passage and waits in the middle. Here, in the middle of the string passage, as shown in FIG. 2, a known heat fusion device 30 is installed as a heat fusion means. The heat-sealing device 30 is a device for heat-sealing the end portions of the first string 10a and the second string 10b made of synthetic resin by pressing, and has a fixed base 32 and a movable base 34, and the heater Built in. Then, on the lower surface of the movable table 34 of the heat-sealing device 30, as shown in FIG. 3, the distal end portion 36 of the second string 10b drawn out from the outer peripheral surface of the second string coil body 20b in the standby state. Is temporarily secured.

  In such a heat fusion apparatus 30, when a predetermined signal is supplied, the movable base 34 rotates downward, and the movable base 34 and the fixed base 32 are in pressure contact with each other for a predetermined time. By being maintained, fusion between the end portions of the cord due to heat is performed. The heater temperature can be adjusted via the dial 35.

  On the other hand, in the continuous connection device 40 provided with such a heat fusion device 30, the two string clamping means 24 comprised of a pair of rod-shaped members above the first string coil body 20a and the second string coil body 20b. , 26 are provided. The pair of rod-like members 24a and 24b constituting the lower string clamping means 24 and the pair of rod-like members 26a and 26b constituting the upper string clamping means 26 are arranged in different directions. That is, the lower bar-shaped members 24a and 24b are arranged in the same direction as the axis of the cord coil bodies 20a and 20b, but the upper bar-shaped members 26a and 26b are arranged with respect to the axis of the string coil bodies 20a and 20b. Arranged vertically.

  In this way, the first string 10a and the second string 10b are once twisted using the two string clamping means 24 and 26 and then guided downstream, for example, the axial length of the string coil body 20b. Even if S is considerably longer than the axial length of the guide rollers 16A, 16B, etc., even when the take-out position when pulling the string is moved largely in the horizontal direction, the posture of the string 10b It is for stabilizing.

  Furthermore, in the present embodiment, a sensor (not shown) is installed between the position where the first string coil body 20a and the second string coil body 20b are disposed and the position where the heat fusion means 30 is installed. This sensor is, for example, an optical sensor composed of a light emitting element and a light receiving element, and the passage of the end of the string is detected by these elements. In addition, the knots 13 and 15 as shown in FIG. 6 can also be formed in the terminal part of a string coil body. In any case, the sensor confirms that there is no remaining string.

  And when it confirms that there is no residual amount of a string, a signal will be transmitted to the heat sealing | fusion apparatus 30 which performs the connection between string ends. Based on this signal, the thermal fusion apparatus 30 operates for a predetermined time. In this way, by the operation of the heat fusion apparatus 30, as shown in FIG. 3, between the fixed base 32 and the movable base 34, the end portion 31 of the first string 10a and the front end portion 36 of the second string 10b The space is heat-sealed. Thus, according to the present embodiment, the connection between the first string 10a and the second string 10b is reliably performed. Thereafter, the second string 10b drawn from the second string coil body 20b is used.

  In this continuous connection device 40, when the use of the first string coil body 20a is completed and the next second string coil body 20b is used, a new string coil body is added to the holding member 5a that has become empty. Is set. Then, the leading end portion of the string drawn out from the outer peripheral surface of the newly set string coil body is temporarily fixed to the lower surface of the movable table 34 of the heat fusion apparatus 30. Thereafter, this operation is repeated.

Thus, in the present embodiment, the second string coil body 20b is automatically used after the use of the first string coil body 20a is completed. And when using the first 1st string coil body 20a and the next 2nd string coil body 20b, the packing string can hold | maintain the attitude | position which expanded the width | variety, and can supply it downstream. As a result, in the automatic strapping machine, even when a flexible material such as a corrugated cardboard sheet is laid flat, the corners of the bundled body are not crushed.

  As mentioned above, although one Example of this invention was described, this invention is not limited to the said Example at all.

  For example, in the above-described embodiment, the known heat fusion device 30 is used as the heat fusion means, but the heat fusion means is not limited to the heat fusion device 30 at all. Further, the sensor for detecting the passage of the string is not limited to the optical sensor, and for example, a proximity sensor can be used.

  Furthermore, the string clamping means 24 and 26 are not essential, and when the length S of the string coil body is not so long as compared with the length of the guide rollers 16A, 16B, etc., without using these string clamping means, The string can be guided directly to the guide rollers 16A and 16B.

  Moreover, in the said Example, as shown in FIG. 3, the front-end | tip part 36 of the 2nd string 10b pulled out from the 2nd string coil body 20b is temporarily fixed to the lower surface of the movable stand 34 in the heat-fusion apparatus 30. However, the temporary fixing position is not limited to the lower surface of the movable table 34. For example, if it is a downstream side from the heat sealing | fusion apparatus 30, another member can be provided and temporarily fixed there.

  Furthermore, the present embodiment can be preferably applied to an automatic tying machine for tying a thin object to be bound such as a corrugated cardboard sheet made of a flexible material, but a string end portion of a normal automatic tying machine that is not flat It can be used effectively for the connection between.

10a 1st string 10b 2nd string 20a 1st string coil body 20b 2nd string coil body 30 Thermal fusion apparatus (thermal fusion means)
31 terminal part 36 tip part 40 continuous connection device

Claims (2)

The first string coil body and the second string coil body that rotate in the horizontal direction, and the first string leading out from the outer peripheral surface of the first string coil body is sent to the downstream of the string passage, Let the tip of the second string drawn from the outer peripheral surface of the second string coil body stand by in the middle of the string path,
When the end portion of the first string passes through the standby position of the second string, the heat fusion means arranged to face the standby position is operated,
A continuous connection device for a packing string in an automatic stringing machine, wherein the terminal end of the first string and the tip of the second string are connected by heat fusion.   A sensor for detecting the passage of the end of the string is installed in the string path from the installation position of the first string coil body and the second string coil body to the standby position of the second string. The apparatus for continuously connecting packing strings in an automatic stringing machine according to claim 1, wherein the heat-sealing means is operated based on the output signal.

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